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WorksheetsSound_LS_3
Total questions: 45
Worksheet time: 24mins
What is the frequency of the sound produced when the vocal cords are:
(a) tight and thin?
High and shrill
Low and deep
High and deep
Low and shrill
What is the frequency of the sound produced when the vocal cords are:
(b) loose and thick?
High and shrill
Low and deep
High and deep
Low and shrill
Why is it more convenient to put your ear to the track if you want to hear a train approaching from far away?
Question: What everyday observation demonstrates that sound travels much more slowly than light?
Why is the flash of lightning seen first, but the sound of thunder is heard a little later, even though lightning and thunder occur in the sky at the same time and the same distance from us?
A) Because light travels faster in air than sound.
B) Because thunder is delayed due to atmospheric conditions.
C) Because lightning creates a visual illusion that precedes the sound.
D) Because thunder is generated at a different altitude than lightning.
Name the object (or part) which vibrates to produce sound in the following musical instruments :
(a) Sitar
Name the object (or part) which vibrates to produce sound in the following musical instruments :
(b) Dholak
Name the object (or part) which vibrates to produce sound in the following musical instruments :
(c) Flute
Name the object (or part) which vibrates to produce sound in the following musical instruments :
(d)Cymbals
The metal plates
Name one musical instrument each in which the sound is produced:
(a) by vibrating a stretched string.
Name one musical instrument each in which the sound is produced:
(b) by vibrating air enclosed in a tube.
Name one musical instrument each in which the sound is produced:
(c) by vibrating a stretched membrane
Name one musical instrument each in which the sound is produced:
(d) by vibrating metal plates.
cymbals
Give two examples of each of the following :
(a) stringed musical instruments.
Give two examples of each of the following :
(b) wind musical instruments.
Give two examples of each of the following :
(c) membrane musical instruments.
Give two examples of each of the following :
(d) plate type musical instruments.
Cymbals, Matka
Which of the sounds having the following frequencies can be heard by the human beings and which cannot?
(a) 6 hertz
human being can hear within the range 20Hz to 20,000Hz
Which of the sounds having the following frequencies can be heard by the human beings and which cannot?
(b) 5000 hertz
human being can hear within the range 20Hz to 20,000Hz
Which of the sounds having the following frequencies can be heard by the human beings and which cannot?
(c) 10000 hertz
human being can hear within the range 20Hz to 20,000Hz
Which of the sounds having the following frequencies can be heard by the human beings and which cannot?
(d) 35000 hertz
human being can hear within the range 20Hz to 20,000Hz
Which of the sounds having the following frequencies can be heard by the human beings and which cannot?
(e) 18kHz
human being can hear within the range 20Hz to 20,000Hz
What is the upper limit of frequency of human hearing?
What is the lower limit of frequency of human hearing?
Name one animal which can produce ultrasonic sounds.
Which two animals are known to be able to hear ultrasonic sounds?
a) Elephants and giraffes
b) Dogs and cats
c) Dolphins and bats
d) Horses and rabbits
What is a vibration (or an oscillation)?
a) The static position of an object in a medium.
b) The random movement of an object in a medium.
c) The to-and-fro motion of an object in a medium.
d) The rotational motion of an object in a medium.
Define 'amplitude' of the vibration of an object.
a) The average distance from the mean position of the object.
b) The smallest distance from the mean position of the object.
c) The largest distance from the mean position of the object.
d) The frequency of the object's motion in a medium.
Which of the following are methods of producing sound?
a) Cooking with a frying pan.
b) Beating a plate and spoon against each other.
c) Watering plants in the garden.
d) Reading a book silently.
Playing guitar is an example of:
a) Silent production.
b) Sound generation.
c) Visual art.
d) Heat transfer.
Why is it more convenient to put the ear to the track when wanting to hear a train approaching from far away?
a) The track acts as a sound amplifier.
b) Trains produce lower-frequency sounds near the track.
c) It reduces background noise.
d) It helps in detecting vibrations from the ground.
What enables us to hear a train approaching from far away when our ear is on the track?
a) Increased air pressure.
b) Amplified electromagnetic waves.
c) Detection of ground vibrations.
d) Enhanced visual perception.
How does sound from a sound-producing body travel through air to reach our ears?
a) The sound-producing body emits light waves that travel through the air.
b) Air particles near the sound-producing body vibrate and exchange energy, which is received by our ears.
c) Sound travels through a vacuum from the body to our ears.
d) Our ears emit signals that attract sound waves.
Why can't a sound be heard on the moon?
a) The moon's surface is too hard, absorbing all sound waves.
b) Moon lacks the necessary equipment to produce sound.
c) Moon does not have any atmosphere, and sound requires a medium to travel.
d) The moon's gravitational pull suppresses sound waves.
State one observation from everyday life which shows that sound travels much slower than light.
a) Hearing music before seeing the musician.
b) Observing a rainbow after hearing thunder.
c) Seeing lightning first, then hearing the sound of thunder.
d) Observing fireworks before hearing their explosions.
How do astronauts talk to one another on the surface of the moon and why?
a) Astronauts communicate through sign language since there is no need for sound.
b) Astronauts have special telepathic abilities on the moon.
c) Astronauts use sound-transmitting devices in their helmets because the moon lacks an atmosphere.
d) Astronauts shout loudly to overcome the vacuum of space.
Why is the use of sound-transmitting devices necessary on the moon?
a) To test the equipment's durability.
b) To overcome the moon's gravity.
c) Because the moon lacks an atmosphere, and sound needs a medium to travel.
d) To communicate with extraterrestrial beings.
What is ultrasound?
a) Sounds having a frequency less than 20Hz.
b) Sounds having a frequency greater than 20,000Hz.
c) Sounds produced only by whales.
d) Sounds used in outer space.
State two uses of ultrasound.
a) Cooking and heating.
b) Used in sonography.
c) Music production.
d) Building construction.
What differences will you hear in a sound if there is an increase in:
(i) Amplitude:
a) The sound will become soft.
b) The sound will become loud.
c) The pitch of the sound will change.
d) The sound will become muffled.
What differences will you hear in a sound if there is an increase in:
(ii) Frequency
a) The sound will become low-pitched.
b) The sound will become shrill.
c) The sound will become faint.
d) The sound will become monotone.
How can you show that a sounding tabla is vibrating?
a) By observing its color change.
b) By measuring its weight.
c) By feeling the vibration of the tabla membrane when it is struck to produce sound.
d) By counting the number of tabla strokes.
On what factor does the loudness of a sound depend?
a) Frequency.
b) Amplitude.
c) Wavelength.
d) Speed.
When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off, but its sound cannot be heard through the air. Why?
a) The railway line acts as a natural amplifier.
b) Metals conduct sound better than air.
c) Trains produce special vibrations on tracks.
d) There is no interference from other sounds.
Why can't sound travel through a vacuum (or through outer space)?
a) Because sound is afraid of emptiness.
b) Because there is no air in a vacuum.
c) Because sound requires a material medium to transfer energy from one particle to another.
d) Because sound gets absorbed by vacuum.
